The center armrest (at least 2018 Premier) appears to slide forward, I think it was two stops. Found it by accident while pushing the button and slipping forward.
Odd thing is, it only opens when fully retracted to the rear. (oh, because when it is forward at stop 2 or 3, the door is no longer aligned over the storage compartment.)
Odd thing is, it only opens when fully retracted to the rear. (oh, because when it is forward at stop 2 or 3, the door is no longer aligned over the storage compartment.)